What is the definition of a housing unit in the U.S. Census?

A housing unit in the U.S. Census is defined as a separate and distinct living space that is occupied or intended for occupancy as separate housing. This includes single-family homes, apartments, mobile homes, and group quarters that provide housing. Each housing unit must have its own entrance and facilities for cooking, sleeping, and sanitation. The definition ensures that all types of residential arrangements are accounted for in population and housing statistics.